.nav{
    line-height: 4em;
    font-size: 15px;
    height: 90vh;
    overflow: auto;
    width: 12%;
    background-color: #fff;
    border-radius: 10px;
    text-align: center;
    position: relative;
    top: 3px;
    float: left;
}
.nav a{
    text-decoration: none;
    color: black;
}
.nav a:hover{
    color: #718690;
}
.nav a:visited{
    background-color: aqua;
    border: #718690;
}
.nav .txt{
    display: flex;
    align-items: center;
    justify-content: center;
}
svg{
    margin-right: 5%;
}